Melting Point 743 °C
 Boiling Point -
 Water Solubility Insoluble in water.
 Density 5.02
 Storage Temp -
 Flash Point -
 Stability Stable. May react with acids to generate poisonous hydrogen sulfide.
 Appearance null Grains/Chunks, approximately 1.5-4.8mm (0.06-0.19 in.)
 Refractive Index 3.08